Flymunich
I highly doubt, that SAA would switch all flights from ZRH to MUC. It might be possible that they start flights into MUC but I have the feeling that ZRH and the Swiss tourism market is quite important for them and for South Africa.

But of course, this would be good for Swiss which has 6 weekly flights to Jo'burg at the moment.

717fan: Are you 100% sure of these additional frequencies to Zurich? There is nothing to reflect the additional flights in either the Amadeus or flysaa.com systems!

I think SAA would need an additional aircraft to provide the extra services.

The airline will indeed be receiving a sixth A340-200 (ZS-SLF) in July. This aircraft will allow the SAA to provide an additional 3 weekly flights to Milan from mid July till end Aug (due to high seasonal demand on the route) At the end of August a new thrice weekly service from Cape Town to Frankfurt will commence using A340-200's.